body {
    background-image: url('../img/table.jpg');
}
.mask{
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position:fixed;
    width:100%;
    height:100%;
    z-index: 20;
    background-image: url('../img/table.jpg');
}
.mask h2{
    color: #fff;
    letter-spacing: 10px;
    margin-bottom:50px;
}
.mask form{
    display: flex;
    width:30%;
    height:40%;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    /* text-align: center; */
    border:1px solid #ccc;
}
.mask input{
    height:40px;
    border:none;
    outline:none;
}
.input_text{
    width:80%;
}
.mask input[type="text"]{
    width:100%;
    padding-left:10px;
}
.mask .btn{
    width:120px;
    height:40px;
    color:#fff;
    margin-top:40px;
    background-color: rgb(55,72,67);
}
header{
    height:25px;
    line-height:25px;
    background-color: rgb(255,255,255,.5);
    padding: 0 20px;
}
.icon{
    width:20px;
    height:20px;
    margin-top:3px;
}
.sideBar,.checkpoint,.student_id,.gold_coins,.submit{
    padding:0 10px;
}
.submit,.back{
    position:relative;
    width:60px;
    height:20px;
    background-color:rgb(52,69,63);
    color:#fff;
    /* border:none;
    outline: none; */
    margin-top:3px;
}
.submit::before{
    position:absolute;
    /* display: block;
    content:""; */
    top:0;
    left:0;
    width:100%;
    height:100%;
    background-color: rgb(255,255,255);
}
.sideBar{
    width:100px;
    /* text-align: center; */
    border:1px solid #ccc;
}
.playbar{
    position:relative;
}
.ulList{
    display: none;
    position:absolute;
    top:25px;
    /* left:0px; */
    width:120px;
    text-align: center;
    z-index: 40;
}
.ulList li{
    border:1px solid #ccc;
    text-align:center;
    background-color: rgb(255,255,255,.8);
}
.ulList li:hover{
    background-color: rgb(55,72,67);
}
.ulList li:hover a{
    color:#fff;
}
.ulList li a{
    color:#000;
}
.container {
    position: relative;
    height: 75vh;
    /* background-image: url('../img/bg.jpg'); */
    border: 1px solid #ccc;
}
.success,.allCard,.continue{
    display: none;
    width:25%;
    height:180px;
    position:absolute;
    top:calc(50% - 90px);
    left:37%;
    background-color: #fff;
    z-index: 999;
    border-radius:10px;
    text-align: center;
    padding:30px 0;
    /* display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center; */
}
/* .allCard{
    display: block;
} */
.allCard button{
    width:60%;
    height:25px;
    color:#fff;
    background-color: rgb(45,62,56);
    margin-top:80px;
}
.success button,.continue button{
    width:60px;
    height:25px;
    color:#fff;
    background-color: rgb(45,62,56);
    /* margin-top:80%; */
    margin-right:10px;
    margin-top:100px;
}
.bottom {
    position: relative;
}

.pic,.picBtm,.openPic {
    position: absolute;
    display: inline-block;
    width: 60px;
    height: 90px;
    /* width: 80px;
    height: 120px; */
    background-image: url(../img/deck.png);
    /* background-size: 1300% 500%; */
    background-size:780px 450px;
    /* border: 1px solid #ccc; */
}
/* .picBtm{
    position:relative;
} */
.bCardLength{
    position:absolute;
    left:10px;
    top:40px;
    font-weight:700;
    color:#fff;
}
.state{
    display: none;
    position:absolute;
    right:0;
    top:10;
    width:240px;
    color:#fff;
    background-color: rgb(0,0,0,.2);
    padding:10px;
    z-index: 999;
}
/* .pic1 {
    background-position: -80px 0px;
}

.pic2 {
    background-position: 80px 0px;
} */